Stay-cutting attachment for sewing-machines.



No; 784,220. PATENTED MARIV, 1905."

1 v L. MARSH. I, v S STAY CUTTING ATTACHMENT FOR SEWING MACHINES;

APPLIOATION FIPBD A P3.13,1904., v

. I Httomegs UNITED STATES Patented March '7, 1905.

PATENT OFFICE.

WILLIS L. MARSH, OF ST. LOUIS, MISSOURI.

SPECIFICATION forming part of Letters Patent No. 784,220, dated. March 7, 1905.

Application filed April13, 1904. Serial No. 203,015.

To all whom it may concern:

Be it known that I, WILLIS L. MARSH, a citizen of the United States, residing at St. Louis,

State of Missouri, have invented a new and useful Stay-Cutting Attachment for Sewing: Machines, of which the following is a specification.

At the present day it is the practice in manufacturing boots and shoes and various types of garments to stay certain of the seams by applying thereover a strip of material and stitching the latter along opposite edges to' the body of the article, there being employed for this purpose a special double-needle machine. In many instances, and, in fact, generally, it is necessary to sever the stay-strip some time prior to reaching the end of the seam, it being customary under the present mode to employ for this purpose a knife or scissors operated by hand and usually inserted with considerable difficulty beneath the stay. This practice necessitates a stoppage of the stitching operation while severing the stay, thus entailing a considerable loss of time from this cause and also in readjusting the stay, which usually becomes displaced during the cutting operation. 7

lVIy invention relates to a stay-cutting attachment for sewing-machines, and has for its objects to produce a simple inexpensive device of this character, which in practice may be conveniently operated for readily and accurately severing the stay without displacing the latter, thus obviating the above-noted objections and insuring asaving in time with a consequent reduction in the cost of manufacturing.

To these ends the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

In the accompanying drawings, Figure 1 is a sectional elevation illustrating my improved device applied to a machine, the latter being conventionally shown. Fig. 2 is a detail sectional plan view of the stay-cutting mechanism. Fig. 3 is a detail perspective view of the cutting knife or blade.

Referring to the drawings, 1 designates a table or support, 2 a stay-sewing machine sustained thereby, and 3 the bed or base of the machine, these parts being of the usual or any preferred construction and material, inasmuch as they constitute no part of my invention.

In accordance with my invention I attach to the bed 3 a stay-guiding member or plate 4, retained in place by screws or otherwise and having a stay-receiving slot or guideway 5, said plate, which of course is disposed at a proper point relative to the feed-plate and needle-bar, being provided adjacent to its ends with transverse slots 6 for the reception of the retaining-screws, to thus permit of transverse adjustability.

Disposed beneath and adapted to operate upon the outer edge of the plate {I is a vertically-movable cutting knife or blade 7, carried by the forward end of a primary supporting-lever 8, said knife being secured in place by a set-screw 9, engaginga vertical longitudinal slot 10 in the blade, whereby the latter is adapted for vertical adjustment relative to the lever. The lever 8, which is adapted for swinging movement in a vertical plane, is pivoted, as at 11, upon a suitable pintle extended through a bearing member or clip 12,

fixed by screws or otherwise to the base 3,

there being applied around the lever adjacent to its forward end a guiding member or clip 13, in turn attached to the base and having a guide member or stud 15, designed to work in a guide opening or way 14, provided in the lever 8.

Attached beneath the table 1 is a bracket or hanger 16, in which an operating bell-crank lever 17 is pivoted at its elbow, as at 18, for a vertical rocking movement, the forwardly-extending horizontal arm of said bell-crank being operatively connected, preferably by means of a link 19, with the rear end of the supporting-lever 8, While to the lower end of the depending vertical arm of the 'bellcrank there is attached a knee member or pad 20, designed in practice for engagement by the knee of the operator in actuating the mechanism.

In operation the strip or stay travels through and .is guided by the plate 4: while being stitched to the body of the article. Upon ap- 'ing of time and expense in manufacturing is effected.

From the foregoing it is apparent that I produce a simple efficient device admirably adapted for the attainment of the ends in view, itbeingunderstood, however,that minor changes in the construction herein set forth may be resorted to without departing from the spirit of the invention.

Having thus described the invention, what I claim is- The combination with a sewing-machine, of a stay-guide carried thereby, a supportinglever pivotally connected with the machine, a guide-clip attached to the machine and receiving the lever. one of said parts being provided with a guide-slot and the other with a projection engaging the slot, a stay-severing knife carried by and adjustable on the lever, an operating bell-crank lever, and operative connection between the operating and supporting levers.

In testimony that I claim the foregoing as my own I have hereto afiixed my signature in the presence of two witnesses.

\VILLIS L. MARSH.

Witnesses:

OLIVE MARSH, E. B. PA'r'roN. 

